Hydraulic turbine.



(LF. CAGHXN. HYDRAULIC TURBINB.

APPLIOATION FILED MAR. 24, 191s.

Patented Mar. 31, 1914.

dit

"I but MNUFACTUMNG COMPANY, F MELWAUKECE, WISCGNSIN, A CORPORATIN @E Specification of Letters Patent.

atented Mar. 31, igtd.

Application area March 24v, 191e. serial ivo. 757,259.

To alla/#wm it may concern ide it known that l, JEAN F. CACHIN, a citizen of the Republic of Switzerland, residing at Milwaukee, in the county of Mil wankee and State of Wisconsin, have invented a certain new and useful improvestruction and in which the normallyinclosed ine elements are readily accessible and removable.

A`Another object is to provide a construction inwhich the size of the inspection pit below the turbine is reduced to a minimum.

Still another object is to permit the use overhead cranes or other constantly available devices, 'for manipulating the turbine elements during assembling and removal 'll if.'

lit is, moreover, an object of the present invention to provide means for permitting .ready removal of the turbine runner and e v guide varies from the lower end of the turbine 'without necessitating disturbance or removal of heavy elements such as the main turbine shaft and the stationary upper turbine casing.

shoe/'ing one of the guide vanes suspended n a hoi. "ing rig. F1 9. is a fragmenverticaihsection through subone'hsl or a vertical hydraulic the' runner 1n place and tuaulicturbine which is simple in con-v designate the same parts in thev the runner point being hoisted into position, and showing one of the guide vanos suspended from its hoisting rig. Fig. 3 is a fragmentary central vertical section throu h substantially one half of a vertical hydrau ic turbine, showing the runner, runner point and guide vane in position, and showing the telescopic draft tube 'and lower guide vane ring being hoisted into position. Fig. 4 is a fragmentary central vertical section thro' h.' substantially one half of a vertical hydrau ic turbine, showing the turbine completely assembled. i

' The spiral inlet turbine casing 3 is provided a' central bore and is supported upon the foundation 19. `The speed ring 6, which censists of a pair of spaced rings connected by stationary guiding and stiening ribs, is fitted into the central bore of the casing 3.' The upper guid'vane ring 12 is mounted concentrically within the speed.

ring 6 and forms a portion of thel u per normally stationary inclosing casing o the turbine. The main turbine shaft 8 is supported vertically within the upper turbine casing and is suspended from a suitable,

thrust bearing of the usual type, not shown, which is located above the turbine. The main turbine shaft 8 is provided with a central bore or passage 18 which extends throughout 'the entire length of the shaft 8. The inspection pit \1 is formed below the turbine and surrounds the,telescopic draft tube casing 5. The it entrance 2 leads from the pit 1 to the ulterior of the power house through an opening at the right of the turbine as disclosed.

. The lower guide vane ring is supported upon the upper end of the telescopic vdraft tube casing 5, and when in assembled posi tion is fastened to the speed ring 6. The` lower end of the telescopic draft tube casing 5 connects with the stationary draft tube 4,' the joint between these elements being suitably packed. r

The. inlet casing 8, speed ring 6, guide vanerings 12, 13,'and draft tube casing', constitute normally stationary turbine elements.

The turbine runner9whenin assembled positionsee Fig; Il, is secured to the lower end of the main turbine shaft 8 and has its discharge end directed into the telgscopic lso draft tube easing 5. The runner point 10 is secured to the mid portion of the runner 9 and serves to properly guide the water" discharged through the blades of the runner into the draft; tube.

The runner t), shaft S, and runner point 1t), constitute normally rotatable .turbine element-s.

Thet'urbine gate mechanismconsists of a series of movable guide vaiics i which are joui'naled in the upper and lower guide vane rings 1Q, 13. The upper ends of the guide vane shafts are provided with the usual gate actuating mechanism, consisting ot' cranks, the inner free ends of which are connected with a guide vane actuating rin-g. The ac tuating ring is shift-able about the turbine axis by means et' a guide rane' actuatingcylinder 11 rin the usual manner. The guide Yanes 'i' and the actuating mechanism therefor constitute normally shiictable turbine elements.

rThe mechanism for manipulating the tui'- bine elements during assembling and dis inantling of saine, consists of cables or ropes llt, 17, which are secured at their upper ends to any suitable hoisting mechanism, such a power house crane. rthe rope it during manipulation oi lovfer turbine elements cxtends through the passage 1S formed u'itliin the main turbineshaft 8 and may be connected with the turbine part to be manipulated by any suitable means such as a nianipuiating .block 15, a hoisting beam lo, or eye-bolts. The ropes 1i', of which there mayv be anumber, are connected to the upper extremities of the guide vane actuating shafts by means of suitable eye-bolts.

ln describing the utility of this invention the logical se uence et operations necessary during assemiiling of the turbine will be given, and it should be understood that during dismantling of the turbine the sequence of .operations would be the reverse. lVith the turbine dismantled, that is with the turtiine runner 9, runner point; 10, guide vane 7, lower guide vane ring 13, and telescopic draft tube easing 5 removed, as disclosed in Fig. 1, the tirst step in the operation of assembling is to raise the runner 9 into place and secure saine to the lower extremity of the main turbine shaft 8. This can be done as disclosed in Fig. 1, by setting the runner 9 upon the manipulating block 15 and attaching the latter to the end of the manipulating rope 14. By pulling upwardly on the .rope .14, the runner 9 can be readily hoisted into its proper position and held there until it is secured to the shaft 8, as disclosed in Eig. 2. After the turbine runner 9 has been property secured to the shaft 8, the runner 'o-iiit 10 is to lbelioisted concentrically within the runner 9 and secured thereto. This may be done as disclosed in Fi 2 by setting the runner point it) in a sutab y formed reminimum. tube casing 5 permits ready inspection of the' vinterior of the turbine for removal of parts cess of the manipulating block 1.3 and rais ing the rope 14 connected with the block. lVhen' the runner point 10 is raised to its proper position within the runner 9, it is firmly secured to the runner as shown in Fig. 4. lith the turbine runner completely assembled, the next operation is to raise the movable guide Yanes 7 into their proper positions relative .to the normally stationary upper guide Vane ring 12. -rThis m'ay readily be done by attaching the rope 1T to the up per end of the actuating stein of eachl of thc individual guide Yanes and hoisting the individual guide Yanes 'i' into their proper pcsitions as indicated in Fig. 3. ll'ith the guide Yanes T properly positioned within the upper guide vane ring 1Q. the lower guide vane ring 13 may be brought into itsproper position lrelative to the speed ring t3 and guide 'Yanes 7, either ily-raising the ring 13 into place independently or by simultaneously raising both the ring 13 and the telescopic draft tube. casing 5 to the position .is indicated in Fig. 4. The hoisting of the telescopic diaft'tube casing 5 may be readily accomplished by inserting the cross-beams 1t) through .suitable manholes Jformed in the casing 5. and securing thtl rope l-t tothe mid position of the beam tti. the rope 1t from above the shaft the casing 5" and lower guide vane ring 13 may readily be brought into their proper positions aiid secured to the adjoining stationary turbine elements.

By forming the draft tube casing 5 tele- B): inanipulating` scopic within the .stationary draft tube 4, the

size oi" the inspection pit 1 is reduced to a The removability of the draft and for making repairs. The tormationo" vertical vmanipulating passages through the upper portion of the turbine and provision of hoisting means extending through these passages, provides simple means for readily centerin the various turbine elements and for manipulating them during dismantling and assembling of the turbine.

It will be noted that the telescopic portion ofthe draft tube easing 5 may readily be furnished as an article of manufacture, to be incorporated in existing turbine installa.- tions.

.It should be understood that it is not desired .to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Pateiit,-

. 1. The combination of turbineeiemt ts some of which forming an inclosing casing, other of said elements being within said cas ing, said casing having a lower one of said elements removable. and another of said nlpments having an opening therethrough 'for manipulation of lower of said turbine elements.

2. The combination of turbine elements some of which forming/an inclosingcasing, other of said turbine elements being with in said casing, said casing having a lower one of said elements removable, and one of said turbine elements being a turbine shaft extending through the upper portion of said casing and having an opening therethrough for manipulation of lower of said turbine elements.

3. rIn combination, an inclosing casing, a

runner within said casing, said easing hav,

ing a removable lower portion, and a vertical runner shaft lextending through the upper portion of said casing and having an opening therethrough for manipulation of said runner.

4. In combination, an inolosing easing, a runner within said casing, Said casing havlng a lower portion telescopic within adjacent strueture, and a verticak runner shaft extending through the upper portion of said casing and having an opening therethrough for manipulation of said runner.

5. The combination of turbine elements some of which forming an inclosing easing, other of said elements being within said casing, said casing having a lower one of said elements telescopic within adjacent structure,andanother of said elements havwithin adjacent structure for permitting aecess to the interior of said casings. A

8. In a turbine, a casing, and a telescopic draft tube for permitting accese to the ini terior of said casing.. i

9. In a turbine in combination, turbine parts with a draft tube portion, and a second draft tube portion telescopic relative to said first draft tube portion.

l0. As an article of manufacture for a turbine, a draft tube portion telescopic in relation to the remainder of the turbine draft tube. In testimony whereof, the signature o the inventor is aiixed hereto in the presence eine@ two witnesses. Y

JEAN F. CGHN.

Witnesses:

W. H. LIEBER, J. el. KANE. 

